Valve train layout structure including cam phaser and camshaft-in-camshaft

摘要

A valve train layout structure may comprise a non-control camshaft connected to a chain sprocket rotating in line with engine timing and adapted not to vary opening/closing timing of a valve, a control camshaft including an outer shaft, a first cam fixed to an outer shaft, an inner shaft rotatably inserted in an outer shaft, and a second cam fixed to an inner shaft and adapted to vary opening/closing timing of at least one of a valve activated by a first cam and a valve activated by a second cam by varying a phase between a first cam and a second cam, and a cam phaser including a rotor and a stator rotatable relatively to each other. One of a rotor and a stator may be operatively connected to the outer shaft and the other of a rotor and a stator is operatively connected to the inner shaft such that the cam phaser can vary the phase between the first cam and the second cam.

主权项

1. A valve train layout structure comprising:
a non-control camshaft connected to a chain sprocket rotating in line with engine timing and adapted not to vary opening/closing timing of a valve; a control camshaft including an outer shaft, a first cam fixed to the outer shaft, an inner shaft rotatably inserted in the outer shaft, and a second cam fixed to the inner shaft and the control camshaft adapted to vary opening/closing timing of at least one of a valve activated by the first cam and a valve activated by the second cam by varying a phase between the first cam and the second cam, the inner and outer shaft fitted with a pair of driven gears, respectively; and a cam phaser mounted on the non-control camshaft and including a rotor and a stator rotatable relatively to each other, the rotor and the stator being fitted with a pair of driving gears respectively, wherein one of the driving gears is gear-meshed with one of the driven gears which is fitted with the inner shaft and another of the driving gears is gear-meshed with another of the driven gears which is fitted with the outer shaft, wherein one of the rotor and the stator is operatively connected to the outer shaft and the other of the rotor and the stator is operatively connected to the inner shaft such that the cam phaser varies the phase between the first cam and the second cam.